1. Orthopedic Biomechanics Research Laboratory, Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
2. Orthopaedic Traumatology, Trauma Center, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, 650 Xin Songjiang Road, Shanghai 201620, China
3. Materials and Structural Testing Core Laboratory, Mayo Clinic, 200 First ST SW, Rochester, MN 55905, USA